I am damned if I'm going to die before I have unraveled more of the universe

Although September 11 was horrible, it didn't threaten the survival of the human race, like nuclear weapons do.

Maybe I'm being a bit harsh on philosophers, but they have not been very kind to me... I have been variously called nominalist, an instrumentalist, a positivist, a realist, and several other ists. The technique seems refutation by denigration: If you can attach a label to my approach, you don't have to say what is wrong with it... I am sure that Einstein, Heisenberg and Dirac didn't worry about whether they were realists or instrumentalists.

It is impossible to imagine a four-dimensional space. I personally find it hard enough to visualize a three-dimensional space!

I have sold more books on physics than Madonna has on sex.

Money is not everything. There's Master card & Visa.

We are very, very small, but we are profoundly capable of very, very big things.